Answer: 1 - %281-0.62%29%5E4 = 1+-+0.38%5E4 = 0.9791.
Explanation:
In a large population, 62% of the people have been vaccinated. If 4 people are randomly selected,
what is the probability that at least one of them has been vaccinated?
Give your answer as a decimal to 4 places.
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This probability is the COMPLEMENT to the probability of the event "No one of 4 has been vaccinated",
and THEREFORE is equal to 1 - %281-0.62%29%5E4 = 1+-+0.38%5E4 = 0.9791.
Solved.